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    <meta charset="UTF-8">
    <title>正弦函数y=Asin(2pifx)</title>
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正弦函数y=Asin(2&pi;fx)
<br>幅度A={{ var1  }}，频率f={{ var2  }}，以及x对应的范围:{{ var3  }}到{{ var4  }}
<br><img src="data:image/png;base64, {{ plot_url }}">
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